* Fix typos in Async docs. PR [#1423](https://github.com/tiangolo/fastapi/pull/1423).

## 0.54.2

* Add translation to Spanish for [Concurrency and async / await - Concurrencia y async / await](https://fastapi.tiangolo.com/es/async/). PR [#1290](https://github.com/tiangolo/fastapi/pull/1290) by [@alvaropernas](https://github.com/alvaropernas).

        public void process(Consumer<TransferEvent> consumer) {
            consumer.accept(event);
        }

        public void waitForProcessed() throws InterruptedException {
            // nothing, is async
        }
    }

    private static class BlockingExchange extends Exchange {
        private final CountDownLatch latch = new CountDownLatch(1);

        private BlockingExchange(TransferEvent event) {

        public void process(Consumer<TransferEvent> consumer) {
            consumer.accept(event);
        }

        public void waitForProcessed() throws InterruptedException {
            // nothing, is async
        }
    }

    private static class BlockingExchange extends Exchange {
        private final CountDownLatch latch = new CountDownLatch(1);

        private BlockingExchange(TransferEvent event) {

{* ../../docs_src/custom_response/tutorial006c_py39.py hl[2,7,9] *}

### `StreamingResponse` { #streamingresponse }

Toma un generador `async` o un generador/iterador normal y transmite el cuerpo del response.

{* ../../docs_src/custom_response/tutorial007_py39.py hl[2,14] *}

Код, следующий за оператором `yield`, выполняется после ответа:

{* ../../docs_src/dependencies/tutorial007_py39.py hl[5:6] *}

/// tip | Подсказка

Можно использовать как `async`, так и обычные функции.

**FastAPI** корректно обработает каждый вариант, так же как и с обычными зависимостями.

///

## Зависимость с `yield` и `try` { #a-dependency-with-yield-and-try }

            assertEquals('a', stream.read());
            assertEquals(-1, stream.read()); // EOF
        }

        // File should be deleted after close
        // Note: FileUtil.deleteInBackground() is async, so we can't reliably test this
    }

    public void test_available() throws Exception {
        // Create a temporary file with test data
        File tempFile = File.createTempFile("test-", ".tmp");

El código posterior a la declaración `yield` se ejecuta después del response:

{* ../../docs_src/dependencies/tutorial007_py39.py hl[5:6] *}

/// tip | Consejo

Puedes usar funciones `async` o regulares.

**FastAPI** hará lo correcto con cada una, igual que con dependencias normales.

///

## Una dependencia con `yield` y `try` { #a-dependency-with-yield-and-try }

	kvDstPool   bpool.Pool[[]jstream.KVS] // pool of []jstream.KVS used for output
	close       chan struct{}             // used for shutting down the splitter before end of stream
	readerWg    sync.WaitGroup            // used to keep track of async reader.
}

// queueItem is an item in the queue.
type queueItem struct {
	input []byte             // raw input sent to the worker
	dst   chan []jstream.KVS // result of block decode

* full stack: full stack (do not translate to "pila completa")
* full-stack: full-stack (do not translate to "de pila completa")
* stack: stack (do not translate to "pila")
* loop (as in async loop): loop (do not translate to "bucle" or "ciclo")
* hard dependencies: dependencias obligatorias (do not translate to "dependencias duras")
* locking: locking (do not translate to "bloqueo")

生成的值会注入到 *路由函数* 和其他依赖项中：

{* ../../docs_src/dependencies/tutorial007.py hl[4] *}

`yield` 语句后面的代码会在创建响应后，发送响应前执行：

{* ../../docs_src/dependencies/tutorial007.py hl[5:6] *}

/// tip | 提示

你可以使用 `async` 或普通函数。

**FastAPI** 会像处理普通依赖一样，对每个依赖做正确的处理。

///

## 包含 `yield` 和 `try` 的依赖项

如果在包含 `yield` 的依赖中使用 `try` 代码块，你会捕获到使用依赖时抛出的任何异常。

例如，如果某段代码在另一个依赖中或在 *路由函数* 中使数据库事务"回滚"或产生任何其他错误，你将会在依赖中捕获到异常。